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How to use runBatchedUpdates method in Playwright Internal

Best JavaScript code snippet using playwright-internal

ReactUpdates.js

...91}92/**93 * æ ¹æ®åç§°å°±ç¥éè¿ä¸ªæ¹æ³æ¯æ§è¡æ¹éæ´æ°94 */95function runBatchedUpdates(transaction) {96  var len = transaction.dirtyComponentsLength;97  dirtyComponents.sort(mountOrderComparator);//æåº98  updateBatchNumber++;99  for (var i = 0; i < len; i++) {100    var component = dirtyComponents[i];101    var callbacks = component._pendingCallbacks;102    component._pendingCallbacks = null;103    var markerName;104    if (ReactFeatureFlags.logTopLevelRenders) {105      var namedComponent = component;106      if (component._currentElement.type.isReactTopLevelWrapper) {107        namedComponent = component._renderedComponent;108      }109      markerName = 'React update: ' + namedComponent.getName();110      console.time(markerName);111    }112    //ç»è¿ä¸äºåå¤ç å¶å®å°±æ¯è°ç¨äºcomponent.performUpdateIfNecessary,ä¹å°±æ¯èªå®ä¹ç»ä»¶ReactCompositeComponent.performUpdateIfNecessary()113    ReactReconciler.performUpdateIfNecessary( component, transaction.reconcileTransaction, updateBatchNumber, );114    if (markerName) {115      console.timeEnd(markerName);116    }117    if (callbacks) {118      for (var j = 0; j < callbacks.length; j++) {119        transaction.callbackQueue.enqueue( callbacks[j], component.getPublicInstance());120      }121    }122  }123}124/**125 *  è¯¥æ¹æ³ç¨äºè¿ä»£dirtyComponents126 */127var flushBatchedUpdates = function() {128    while (dirtyComponents.length || asapEnqueued) {129        if (dirtyComponents.length) {130            var transaction = ReactUpdatesFlushTransaction.getPooled();131            //åä»¥äºç©çå½¢å¼è°ç¨äº runBatchedUpdates()132            transaction.perform(runBatchedUpdates, null, transaction);133            //éæ¾å®ä¾134            ReactUpdatesFlushTransaction.release(transaction);135        }136        if (asapEnqueued) {137            asapEnqueued = false;138            var queue = asapCallbackQueue;139            asapCallbackQueue = CallbackQueue.getPooled();140            queue.notifyAll();141            CallbackQueue.release(queue);142        }143    }144};145/**...

2b21a8ReactUpdates.js

Source: 2b21a8ReactUpdates.js

...73}74function mountOrderComparator(c1,c2){75return c1._mountOrder-c2._mountOrder;76}77function runBatchedUpdates(transaction){78var len=transaction.dirtyComponentsLength;79invariant(80len===dirtyComponents.length,81'Expected flush transaction\'s stored dirty-components length (%s) to '+82'match dirty-components array length (%s).',83len,84dirtyComponents.length);85dirtyComponents.sort(mountOrderComparator);86updateBatchNumber++;87for(var i=0;i<len;i++){88var component=dirtyComponents[i];89var callbacks=component._pendingCallbacks;90component._pendingCallbacks=null;91var markerName;...

3843d125b0bc8dfecad4466cda6efb05d537f0ReactUpdates.js

Source: 3843d125b0bc8dfecad4466cda6efb05d537f0ReactUpdates.js

...49}50function mountOrderComparator(c1, c2) {51  return c1._mountOrder - c2._mountOrder;52}53function runBatchedUpdates(transaction) {54  var len = transaction.dirtyComponentsLength;55  invariant(len === dirtyComponents.length, "Expected flush transaction's stored dirty-components length (%s) to " + 'match dirty-components array length (%s).', len, dirtyComponents.length);56  dirtyComponents.sort(mountOrderComparator);57  updateBatchNumber++;58  for (var i = 0; i < len; i++) {59    var component = dirtyComponents[i];60    var markerName;61    if (ReactFeatureFlags.logTopLevelRenders) {62      var namedComponent = component;63      if (component._currentElement.type.isReactTopLevelWrapper) {64        namedComponent = component._renderedComponent;65      }66      markerName = 'React update: ' + namedComponent.getName();67      console.time(markerName);...

4b981e8be525e584b53b01f3d4808e4e75c7fdReactUpdates.js

Source: 4b981e8be525e584b53b01f3d4808e4e75c7fdReactUpdates.js

...49}50function mountOrderComparator(c1, c2) {51  return c1._mountOrder - c2._mountOrder;52}53function runBatchedUpdates(transaction) {54  var len = transaction.dirtyComponentsLength;55  invariant(len === dirtyComponents.length, "Expected flush transaction's stored dirty-components length (%s) to " + 'match dirty-components array length (%s).', len, dirtyComponents.length);56  dirtyComponents.sort(mountOrderComparator);57  updateBatchNumber++;58  for (var i = 0; i < len; i++) {59    var component = dirtyComponents[i];60    var markerName;61    if (ReactFeatureFlags.logTopLevelRenders) {62      var namedComponent = component;63      if (component._currentElement.type.isReactTopLevelWrapper) {64        namedComponent = component._renderedComponent;65      }66      markerName = 'React update: ' + namedComponent.getName();67      console.time(markerName);...

a7f03b49446e99a1388faf36f049d39c9293b2ReactUpdates.js

Source: a7f03b49446e99a1388faf36f049d39c9293b2ReactUpdates.js

...49}50function mountOrderComparator(c1, c2) {51  return c1._mountOrder - c2._mountOrder;52}53function runBatchedUpdates(transaction) {54  var len = transaction.dirtyComponentsLength;55  invariant(len === dirtyComponents.length, "Expected flush transaction's stored dirty-components length (%s) to " + 'match dirty-components array length (%s).', len, dirtyComponents.length);56  dirtyComponents.sort(mountOrderComparator);57  updateBatchNumber++;58  for (var i = 0; i < len; i++) {59    var component = dirtyComponents[i];60    var markerName;61    if (ReactFeatureFlags.logTopLevelRenders) {62      var namedComponent = component;63      if (component._currentElement.type.isReactTopLevelWrapper) {64        namedComponent = component._renderedComponent;65      }66      markerName = 'React update: ' + namedComponent.getName();67      console.time(markerName);...

c7189c816ca5d14360a9c31baf238bca1bb92aReactUpdates.js

Source: c7189c816ca5d14360a9c31baf238bca1bb92aReactUpdates.js

...49}50function mountOrderComparator(c1, c2) {51  return c1._mountOrder - c2._mountOrder;52}53function runBatchedUpdates(transaction) {54  var len = transaction.dirtyComponentsLength;55  invariant(len === dirtyComponents.length, "Expected flush transaction's stored dirty-components length (%s) to " + 'match dirty-components array length (%s).', len, dirtyComponents.length);56  dirtyComponents.sort(mountOrderComparator);57  updateBatchNumber++;58  for (var i = 0; i < len; i++) {59    var component = dirtyComponents[i];60    var markerName;61    if (ReactFeatureFlags.logTopLevelRenders) {62      var namedComponent = component;63      if (component._currentElement.type.isReactTopLevelWrapper) {64        namedComponent = component._renderedComponent;65      }66      markerName = 'React update: ' + namedComponent.getName();67      console.time(markerName);...

b173d786fb2390743a1da26410c872f6606b94ReactUpdates.js

Source: b173d786fb2390743a1da26410c872f6606b94ReactUpdates.js

...49}50function mountOrderComparator(c1, c2) {51  return c1._mountOrder - c2._mountOrder;52}53function runBatchedUpdates(transaction) {54  var len = transaction.dirtyComponentsLength;55  invariant(len === dirtyComponents.length, "Expected flush transaction's stored dirty-components length (%s) to " + 'match dirty-components array length (%s).', len, dirtyComponents.length);56  dirtyComponents.sort(mountOrderComparator);57  updateBatchNumber++;58  for (var i = 0; i < len; i++) {59    var component = dirtyComponents[i];60    var markerName;61    if (ReactFeatureFlags.logTopLevelRenders) {62      var namedComponent = component;63      if (component._currentElement.type.isReactTopLevelWrapper) {64        namedComponent = component._renderedComponent;65      }66      markerName = 'React update: ' + namedComponent.getName();67      console.time(markerName);...

module$ReactUpdates.js

Source: module$ReactUpdates.js

1goog.provide("module$ReactUpdates");2var module$ReactUpdates = {};3goog.require("module$invariant");4var invariant$$module$ReactUpdates = module$invariant;5var dirtyComponents$$module$ReactUpdates = [];6var batchingStrategy$$module$ReactUpdates = null;7function ensureBatchingStrategy$$module$ReactUpdates() {8  invariant$$module$ReactUpdates(batchingStrategy$$module$ReactUpdates)9}10function batchedUpdates$$module$ReactUpdates(callback, param) {11  ensureBatchingStrategy$$module$ReactUpdates();12  batchingStrategy$$module$ReactUpdates.batchedUpdates(callback, param)13}14function mountDepthComparator$$module$ReactUpdates(c1, c2) {15  return c1._mountDepth - c2._mountDepth16}17function runBatchedUpdates$$module$ReactUpdates() {18  dirtyComponents$$module$ReactUpdates.sort(mountDepthComparator$$module$ReactUpdates);19  for(var i = 0;i < dirtyComponents$$module$ReactUpdates.length;i++) {20    var component = dirtyComponents$$module$ReactUpdates[i];21    if(component.isMounted()) {22      var callbacks = component._pendingCallbacks;23      component._pendingCallbacks = null;24      component.performUpdateIfNecessary();25      if(callbacks) {26        for(var j = 0;j < callbacks.length;j++) {27          callbacks[j].call(component)28        }29      }30    }31  }32}33function clearDirtyComponents$$module$ReactUpdates() {34  dirtyComponents$$module$ReactUpdates.length = 035}36function flushBatchedUpdates$$module$ReactUpdates() {37  try {38    runBatchedUpdates$$module$ReactUpdates()39  }catch(e) {40    throw e;41  }finally {42    clearDirtyComponents$$module$ReactUpdates()43  }44}45function enqueueUpdate$$module$ReactUpdates(component, callback) {46  invariant$$module$ReactUpdates(!callback || typeof callback === "function");47  ensureBatchingStrategy$$module$ReactUpdates();48  if(!batchingStrategy$$module$ReactUpdates.isBatchingUpdates) {49    component.performUpdateIfNecessary();50    callback && callback();51    return52  }53  dirtyComponents$$module$ReactUpdates.push(component);54  if(callback) {55    if(component._pendingCallbacks) {56      component._pendingCallbacks.push(callback)57    }else {58      component._pendingCallbacks = [callback]59    }60  }61}62var ReactUpdatesInjection$$module$ReactUpdates = {injectBatchingStrategy:function(_batchingStrategy) {63  invariant$$module$ReactUpdates(_batchingStrategy);64  invariant$$module$ReactUpdates(typeof _batchingStrategy.batchedUpdates === "function");65  invariant$$module$ReactUpdates(typeof _batchingStrategy.isBatchingUpdates === "boolean");66  batchingStrategy$$module$ReactUpdates = _batchingStrategy67}};68var ReactUpdates$$module$ReactUpdates = {batchedUpdates:batchedUpdates$$module$ReactUpdates, enqueueUpdate:enqueueUpdate$$module$ReactUpdates, flushBatchedUpdates:flushBatchedUpdates$$module$ReactUpdates, injection:ReactUpdatesInjection$$module$ReactUpdates};69module$ReactUpdates.module$exports = ReactUpdates$$module$ReactUpdates;70if(module$ReactUpdates.module$exports) {71  module$ReactUpdates = module$ReactUpdates.module$exports72}...

Using AI Code Generation

1const { runBatchedUpdates } = require('playwright/lib/server/frames');2const { chromium } = require('playwright');3(async () => {4  const browser = await chromium.launch();5  const context = await browser.newContext();6  const page = await context.newPage();7  await runBatchedUpdates(page, async () => {8    await page.click('input[name="q"]', { force: true });9    await page.fill('input[name="q"]', 'Playwright');10    await page.press('input[name="q"]', 'Enter');11  });12  await page.screenshot({ path: 'example.png' });13  await browser.close();14})();

Using AI Code Generation

1const { runBatchedUpdates } = require('playwright/lib/server/supplements/recorder/recorderSupplement');2const { chromium } = require('playwright');3(async () => {4  const browser = await chromium.launch();5  const page = await browser.newPage();6  await runBatchedUpdates(async () => {7    await page.click('text=Get started');8    await page.click('text=Docs');9    await page.click('text=API');10    await page.click('text=class: Page');11    await page.click('text=class: Page');12  });13  await browser.close();14})();15const { runBatchedUpdates } = require('playwright/lib/server/supplements/recorder/recorderSupplement');16const { chromium } = require('playwright');17(async () => {18  const browser = await chromium.launch();19  const page = await browser.newPage();20  await runBatchedUpdates(async () => {21    await page.click('text=Get started');22    await page.click('text=Docs');23    await page.click('text=API');24    await page.click('text=class: Page');25    await page.click('text=class: Page');26  });27  await browser.close();28})();

Using AI Code Generation

1const { chromium } = require('playwright');2(async () => {3  const browser = await chromium.launch();4  const page = await browser.newPage();5  await page.$eval('input[name="q"]', el => el.value = 'Hello World');6  await page.runBatchedUpdates(async () => {7    await page.$eval('input[name="q"]', el => el.value = 'Hello World 1');8    await page.$eval('input[name="q"]', el => el.value = 'Hello World 2');9    await page.$eval('input[name="q"]', el => el.value = 'Hello World 3');10  });11  await browser.close();12})();13const { chromium } = require('playwright');14(async () => {15  const browser = await chromium.launch();16  const context = await browser.newContext();17  const page = await context.newPage();18  await page.click('text=Request permission');19  await page.click('text=Show position');20  await browser.close();21})();

Using AI Code Generation

1const { runBatchedUpdates } = require('playwright/lib/server/progress');2const { chromium } = require('playwright');3(async () => {4  const browser = await chromium.launch();5  const context = await browser.newContext();6  const page = await context.newPage();7  await page.screenshot({ path: 'example.png' });8  await browser.close();9})();10const { runBatchedUpdates } = require('playwright/lib/server/progress');11const { chromium } = require('playwright');12(async () => {13  const browser = await chromium.launch();14  const context = await browser.newContext();15  const page = await context.newPage();16  await page.screenshot({ path: 'example.png' });17  await browser.close();18})();19const { runBatchedUpdates } = require('playwright/lib/server/progress');20const { chromium } = require('playwright');21(async () => {22  const browser = await chromium.launch();23  const context = await browser.newContext();24  const page = await context.newPage();25  await page.screenshot({ path: 'example.png' });26  await browser.close();27})();28const { runBatchedUpdates } = require('playwright/lib/server/progress');29const { chromium } = require('playwright');30(async () => {31  const browser = await chromium.launch();32  const context = await browser.newContext();33  const page = await context.newPage();34  await page.screenshot({ path: 'example.png' });35  await browser.close();36})();37const { runBatchedUpdates } = require('playwright/lib/server/progress');38const { chromium } = require('playwright');39(async () => {40  const browser = await chromium.launch();41  const context = await browser.newContext();42  const page = await context.newPage();

Using AI Code Generation

1const { runBatchedUpdates } = require('playwright/lib/server/batchUpdates');2const { runBatchedUpdates } = require('playwright/lib/server/batchUpdates');3const { runBatchedUpdates } = require('playwright/lib/server/batchUpdates');4const { runBatchedUpdates } = require('playwright/lib/server/batchUpdates');5const { runBatchedUpdates } = require('playwright/lib/server/batchUpdates');6const { runBatchedUpdates } = require('playwright/lib/server/batchUpdates');7const { runBatchedUpdates } = require('playwright/lib/server/batchUpdates');8const { runBatchedUpdates } = require('playwright/lib/server/batchUpdates');9const { runBatchedUpdates } = require('playwright/lib/server/batchUpdates');10const { runBatchedUpdates } = require('playwright/lib/server/batchUpdates');11const { runBatchedUpdates } = require('playwright/lib/server/batchUpdates');12const { runBatchedUpdates } = require('playwright/lib/server/batchUpdates');13const { runBatchedUpdates } = require('playwright/lib/server/batchUpdates');14const { runBatchedUpdates } = require('playwright/lib/server/batchUpdates');15const { runBatchedUpdates } = require('playwright/lib/server/batchUpdates');16const { runBatchedUpdates } = require('playwright/lib/server/batchUpdates');

Using AI Code Generation

1const { chromium } = require('playwright');2const fs = require('fs');3const path = require('path');4const { runBatchedUpdates } = require('playwright/lib/server/supplements/recorder/recorderSupplement');5(async () => {6  const browser = await chromium.launch({ headless: false });7  const page = await browser.newPage();8  await page.fill('input[name="q"]', 'Hello world');9  await page.press('input[name="q"]', 'Enter');10  await page.waitForNavigation();11  await page.screenshot({ path: `example.png` });12  await browser.close();13})();14const { Page } = require('./page');15const { helper } = require('./helper');16const { events } = require('./events');17const { assert } = require('./helper');18class RecorderSupplement {19  constructor(page) {20    this._page = page;21    this._recording = false;22    this._recorder = null;23    this._recordingPaused = false;24    this._recordingPausedPromise = null;25    this._recordingPausedCallback = null;26    this._recordingPausedPromiseCallback = null;27    this._recordingPausedPromise = null;28    this._lastAction = null;29    this._lastActionId = 0;30    this._lastActionPromise = null;31    this._lastActionCallback = null;32    this._lastActionPromiseCallback = null;33    this._lastActionPromise = null;34    this._recordingCallback = null;35    this._recordingPromise = null;36    this._recordingPromiseCallback = null;37    this._recordingCallback = null;38    this._lastAction = null;39    this._lastActionId = 0;40    this._lastActionPromise = null;41    this._lastActionCallback = null;42    this._lastActionPromiseCallback = null;43    this._lastActionPromise = null;44    this._recordingCallback = null;45    this._recordingPromise = null;46    this._recordingPromiseCallback = null;47    this._recordingCallback = null;48    this._lastAction = null;49    this._lastActionId = 0;50    this._lastActionPromise = null;

Using AI Code Generation

1const { runBatchedUpdates } = require('playwright/lib/internal/batching');2(async () => {3  await runBatchedUpdates(async () => {4    await page.click('button');5    await page.click('button');6  })7})();8const { runBatchedUpdates } = require('playwright/lib/internal/batching');9(async () => {10  const result = await runBatchedUpdates(async () => {11    await page.click('button');12    await page.click('button');13    return 'result';14  })15})();16page.click()17page.dblclick()18page.fill()19page.selectOption()20page.setInputFiles()21page.type()22page.uncheck()23page.check()24page.press()25page.waitForTimeout()26page.waitForFunction()27page.waitForSelector()28page.waitForXPath()29page.waitForNavigation()30page.waitForRequest()31page.waitForResponse()32page.waitForEvent()33page.waitForFileChooser()34page.setContent()35page.setExtraHTTPHeaders()36page.setGeolocation()37page.setOfflineMode()38page.setHTTPCredentials()39page.setCacheEnabled()40page.setBypassCSP()41page.setViewportSize()42page.grantPermissions()43page.route()44page.route()45page.unroute()46page.unroute()47page.setContent()48page.addScriptTag()49page.addStyleTag()50page.setJavaScriptEnabled()51page.setViewportSize()52page.setContent()53page.setContent()54page.setContent()55page.setContent()56page.setContent()57page.setContent()58page.setContent()59page.setContent(

Using AI Code Generation

1const { runBatchedUpdates } = require('playwright/lib/server/dom.js');2let batchedUpdates = runBatchedUpdates();3const { runBatchedUpdates } = require('playwright/lib/server/dom.js');4let batchedUpdates = runBatchedUpdates();5const { runBatchedUpdates } = require('playwright/lib/server/dom.js');6let batchedUpdates = runBatchedUpdates();7const { runBatchedUpdates } = require('playwright/lib/server/dom.js');8let batchedUpdates = runBatchedUpdates();9const { runBatchedUpdates } = require('playwright/lib/server/dom.js');10let batchedUpdates = runBatchedUpdates();11const { runBatchedUpdates } = require('playwright/lib/server/dom.js');12let batchedUpdates = runBatchedUpdates();13const { runBatchedUpdates } = require('playwright/lib/server/dom.js');14let batchedUpdates = runBatchedUpdates();15const { runBatchedUpdates } = require('playwright/lib/server/dom.js');16let batchedUpdates = runBatchedUpdates();

Using AI Code Generation

1const playwright = require('playwright');2const { runBatchedUpdates } = require('playwright/lib/server/browserContext');3const { chromium } = require('playwright');4const { expect } = require('chai');5const { test, expect } = require('@playwright/test');6test('test', async ({ page }) => {7  const title = page.locator('#main > div:nth-child(1) > div > div > div:nth-child(1) > div > div > div > div > div > div > div > div > div > h1');8  await expect(title).toHaveText('Playwright');9  await page.close();10});11const { test, expect } = require('@playwright/test');12test('test', async ({ page }) => {13  await page.click('#main > div:nth-child(1) > div > div > div:nth-child(1) > div > div > div > div > div > div > div > div > div > h1 > a');14  await page.goBack();15  await page.close();16});

Using AI Code Generation

1const { runBatchedUpdates } = require('playwright/lib/server/supplements/recorder/recorderSupplement.js');2runBatchedUpdates(() => {3});4Google Chrome (stable, beta, dev, and canary)5Microsoft Edge (stable and beta)6Mozilla Firefox (stable)7const { chromium } = require('playwright');8(async () => {9  const browser = await chromium.launch();10})();11const { chromium } = require('playwright');12(async () => {13  const browser = await chromium.launch();14})();15const { chromium } = require('playwright');16(async () => {17  const browser = await chromium.launch({18  });19})();20const { firefox } = require('playwright');21(async () => {22  const browser = await firefox.launch();23})();24const { webkit } = require('playwright');25(async () => {26  const browser = await webkit.launch();27})();28const { chromium } = require('playwright');29(async () => {30  const browser = await chromium.launch({ headless: false });31})();32const { chromium } = require('playwright');33(async () => {34  const browser = await chromium.launch({35    proxy: {36    }37  });38})();39const { chromium } = require

StackOverFlow community discussions

Questions

Discussion

Is it possible to get the selector from a locator object in playwright?

How to run a list of test suites in a single file concurrently in jest?

Jest + Playwright - Test callbacks of event-based DOM library

firefox browser does not start in playwright

Running Playwright in Azure Function

firefox browser does not start in playwright

Well this is one way, but not sure if it will work for all possible locators!.

// Get a selector from a playwright locator
import { Locator } from "@playwright/test";
export function extractSelector(locator: Locator) {
    const selector = locator.toString();
    const parts = selector.split("@");
    if (parts.length !== 2) { throw Error("extractSelector: susupect that this is not a locator"); }
    if (parts[0] !== "Locator") { throw Error("extractSelector: did not find locator"); }
    return parts[1];
}

https://stackoverflow.com/questions/72044959/is-it-possible-to-get-the-selector-from-a-locator-object-in-playwright

Assuming you are not running test with the --runinband flag, the simple answer is yes but it depends ????

There is a pretty comprehensive GitHub issue jest#6957 that explains certain cases of when tests are run concurrently or in parallel. But it seems to depend on a lot of edge cases where jest tries its best to determine the fastest way to run the tests given the circumstances.

To my knowledge there is no way to force jest to run in parallel.

Aside

Have you considered using playwright instead of puppeteer with jest? Playwright has their own internally built testing library called @playwright/test that is used in place of jest with a similar API. This library allows for explicitly defining test groups in a single file to run in parallel (i.e. test.describe.parallel) or serially (i.e. test.describe.serial). Or even to run all tests in parallel via a config option.

// parallel
test.describe.parallel('group', () => {
  test('runs in parallel 1', async ({ page }) => {});
  test('runs in parallel 2', async ({ page }) => {});
});

// serial
test.describe.serial('group', () => {
  test('runs first', async ({ page }) => {});
  test('runs second', async ({ page }) => {});
});

https://stackoverflow.com/questions/73497773/how-to-run-a-list-of-test-suites-in-a-single-file-concurrently-in-jest

This question is quite close to a "need more focus" question. But let's try to give it some focus:

Does Playwright has access to the cPicker object on the page? Does it has access to the window object?

Yes, you can access both cPicker and the window object inside an evaluate call.

Should I trigger the events from the HTML file itself, and in the callbacks, print in the DOM the result, in some dummy-element, and then infer from that dummy element text that the callbacks fired?

Exactly, or you can assign values to a javascript variable:

const cPicker = new ColorPicker({
  onClickOutside(e){
  },
  onInput(color){
    window['color'] = color;
  },
  onChange(color){
    window['result'] = color;
  }
})

And then

it('Should call all callbacks with correct arguments', async() => {
    await page.goto(`http://localhost:5000/tests/visual/basic.html`, {waitUntil:'load'})

    // Wait until the next frame
    await page.evaluate(() => new Promise(requestAnimationFrame))

    // Act
   
    // Assert
    const result = await page.evaluate(() => window['color']);
    // Check the value
})

https://stackoverflow.com/questions/65477895/jest-playwright-test-callbacks-of-event-based-dom-library

I found the error. It was because of some missing libraries need. I discovered this when I downgraded playwright to version 1.9 and ran the the code then this was the error msg:

(node:12876) UnhandledPromiseRejectionWarning: browserType.launch: Host system is missing dependencies!

Some of the Universal C Runtime files cannot be found on the system. You can fix
that by installing Microsoft Visual C++ Redistributable for Visual Studio from:
https://support.microsoft.com/en-us/help/2977003/the-latest-supported-visual-c-downloads

Full list of missing libraries:
    vcruntime140.dll
    msvcp140.dll
Error
    at Object.captureStackTrace (D:\Projects\snkrs-play\node_modules\playwright\lib\utils\stackTrace.js:48:19)
    at Connection.sendMessageToServer (D:\Projects\snkrs-play\node_modules\playwright\lib\client\connection.js:69:48)
    at Proxy.<anonymous> (D:\Projects\snkrs-play\node_modules\playwright\lib\client\channelOwner.js:64:61)
    at D:\Projects\snkrs-play\node_modules\playwright\lib\client\browserType.js:64:67
    at BrowserType._wrapApiCall (D:\Projects\snkrs-play\node_modules\playwright\lib\client\channelOwner.js:77:34)
    at BrowserType.launch (D:\Projects\snkrs-play\node_modules\playwright\lib\client\browserType.js:55:21)
    at D:\Projects\snkrs-play\index.js:4:35
    at Object.<anonymous> (D:\Projects\snkrs-play\index.js:7:3)
    at Module._compile (internal/modules/cjs/loader.js:1063:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1092:10)
(Use `node --trace-warnings ...` to show where the warning was created)
(node:12876) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 1)
(node:12876) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

A list of missing libraries was provided. After successful installments, firefox ran fine. I upgraded again to version 1.10 and firefox still works.

https://stackoverflow.com/questions/66984974/firefox-browser-does-not-start-in-playwright

I found the error. It was because of some missing libraries need. I discovered this when I downgraded playwright to version 1.9 and ran the the code then this was the error msg:

(node:12876) UnhandledPromiseRejectionWarning: browserType.launch: Host system is missing dependencies!

Some of the Universal C Runtime files cannot be found on the system. You can fix
that by installing Microsoft Visual C++ Redistributable for Visual Studio from:
https://support.microsoft.com/en-us/help/2977003/the-latest-supported-visual-c-downloads

Full list of missing libraries:
    vcruntime140.dll
    msvcp140.dll
Error
    at Object.captureStackTrace (D:\Projects\snkrs-play\node_modules\playwright\lib\utils\stackTrace.js:48:19)
    at Connection.sendMessageToServer (D:\Projects\snkrs-play\node_modules\playwright\lib\client\connection.js:69:48)
    at Proxy.<anonymous> (D:\Projects\snkrs-play\node_modules\playwright\lib\client\channelOwner.js:64:61)
    at D:\Projects\snkrs-play\node_modules\playwright\lib\client\browserType.js:64:67
    at BrowserType._wrapApiCall (D:\Projects\snkrs-play\node_modules\playwright\lib\client\channelOwner.js:77:34)
    at BrowserType.launch (D:\Projects\snkrs-play\node_modules\playwright\lib\client\browserType.js:55:21)
    at D:\Projects\snkrs-play\index.js:4:35
    at Object.<anonymous> (D:\Projects\snkrs-play\index.js:7:3)
    at Module._compile (internal/modules/cjs/loader.js:1063:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1092:10)
(Use `node --trace-warnings ...` to show where the warning was created)
(node:12876) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 1)
(node:12876) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

A list of missing libraries was provided. After successful installments, firefox ran fine. I upgraded again to version 1.10 and firefox still works.

https://stackoverflow.com/questions/66984974/firefox-browser-does-not-start-in-playwright

Blogs

Check out the latest blogs from LambdaTest on this topic:

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Scala Testing: A Comprehensive Guide

Before we discuss Scala testing, let us understand the fundamentals of Scala and how this programming language is a preferred choice for your development requirements.The popularity and usage of Scala are rapidly rising, evident by the ever-increasing open positions for Scala developers.

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When it comes to UI components, there are two versatile methods that we can use to build it for your website: either we can use prebuilt components from a well-known library or framework, or we can develop our UI components from scratch.

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Playwright tutorial

LambdaTest’s Playwright tutorial will give you a broader idea about the Playwright automation framework, its unique features, and use cases with examples to exceed your understanding of Playwright testing. This tutorial will give A to Z guidance, from installing the Playwright framework to some best practices and advanced concepts.

Chapters:

What is Playwright : Playwright is comparatively new but has gained good popularity. Get to know some history of the Playwright with some interesting facts connected with it.
How To Install Playwright : Learn in detail about what basic configuration and dependencies are required for installing Playwright and run a test. Get a step-by-step direction for installing the Playwright automation framework.
Playwright Futuristic Features: Launched in 2020, Playwright gained huge popularity quickly because of some obliging features such as Playwright Test Generator and Inspector, Playwright Reporter, Playwright auto-waiting mechanism and etc. Read up on those features to master Playwright testing.
What is Component Testing: Component testing in Playwright is a unique feature that allows a tester to test a single component of a web application without integrating them with other elements. Learn how to perform Component testing on the Playwright automation framework.
Inputs And Buttons In Playwright: Every website has Input boxes and buttons; learn about testing inputs and buttons with different scenarios and examples.
Functions and Selectors in Playwright: Learn how to launch the Chromium browser with Playwright. Also, gain a better understanding of some important functions like “BrowserContext,” which allows you to run multiple browser sessions, and “newPage” which interacts with a page.
Handling Alerts and Dropdowns in Playwright : Playwright interact with different types of alerts and pop-ups, such as simple, confirmation, and prompt, and different types of dropdowns, such as single selector and multi-selector get your hands-on with handling alerts and dropdown in Playright testing.
Playwright vs Puppeteer: Get to know about the difference between two testing frameworks and how they are different than one another, which browsers they support, and what features they provide.
Run Playwright Tests on LambdaTest: Playwright testing with LambdaTest leverages test performance to the utmost. You can run multiple Playwright tests in Parallel with the LammbdaTest test cloud. Get a step-by-step guide to run your Playwright test on the LambdaTest platform.
Playwright Python Tutorial: Playwright automation framework support all major languages such as Python, JavaScript, TypeScript, .NET and etc. However, there are various advantages to Python end-to-end testing with Playwright because of its versatile utility. Get the hang of Playwright python testing with this chapter.
Playwright End To End Testing Tutorial: Get your hands on with Playwright end-to-end testing and learn to use some exciting features such as TraceViewer, Debugging, Networking, Component testing, Visual testing, and many more.
Playwright Video Tutorial: Watch the video tutorials on Playwright testing from experts and get a consecutive in-depth explanation of Playwright automation testing.